Improvement in governors for direct-acting engines



the city, county, and

UNITED STATES PATENT OEEICE.

y ADAM s. CAMERON, or NEW vonk, N. Y.

IMPROVEMENT IN GOVERNORS'FOR DIRECT-ACTING ENGINES.

Specification forming part of Letters Patent No. 112,415, dated March 7, 1871.

To all whom t may concern.-

Be it known that I' ADAM S. CAMERON, of tate of New York, have invented a new and Improved Governor for Direct-Acting Engines; and I do hereby decla're the followingto be a full, clear, and eX- act description thereof, which will enable those skilled in the art to make and use the same, reference being had ,to the accompanying drawing, forming part of this specification, which drawing represents a plan or top view of a direct-actin g engine itted up with a governer according to my invention.

This invention consists in controlling the supply of steam to `the cylinder of a directac'ting engine, in which the length of the stroke of the piston, in the absence of a crank, changeswith the speed at whichv said piston travels, `by causingthe pistongitself to partially* or wholly close the throttle-.valve whenever .itsi speed, andV consequently vits stroke, increase'beyond the desired limit.

In the example shown by the drawing, the letter A designates the steam-cylinder of a direct-acting engine, the piston of which connects by a rod, B, with `the plunger working in the pumping-cylinder G.

In the rod B is secured a stud, a., which catches in a slot, b, in the end of a lever, D, which swings on a vertical pivot, c, secured in a bracket, E, rising from the bed-plate of the engine, or which maybe made to swing loosely on the spindle of the throttle-valve F, said valve being so arranged that its spindle occupies a vertical position.

With said spindle are rmly connected two tappets, e, which are situated one on each side of the lever D, and at such a distance apart that the lever will just come in contact with the same at each end of the regular stroke of the steam-piston. y

. O11 the spindle of the throttle-valve is also mounted a rod, G, on which is secured a weight, H, and the outer end of which is supported by au arc, I. `The weight H is made adjustable on the rod G, so that it can'be moved inand out, and it is secured in the `desired position by a set-screw.

If the engine runs at its regular speed the lever D just touches the tappets c at the end of each stroke of the piston, and the throttlevalve and the rod G, with its weight, are not disturbed; but if the speed of the engine, and in consequence thereof the stroke of the piston, increase, the lever D strikes one of the tappets e at the end of the Iirst increased stroke of the piston, and the throttle-valve is partially closed, and remains thus while the engine is taking steam during the succeeding stroke, and the engine is thereby prevented from running away. i

The amount of the motion imparted to the throttle-valve by the lever D depends in some measure nupon the position oi' the weight H. If this weight is far out on the rod G and the lever D strikes one of the tappet-s, said weight is carried farther by its momentum than itis if it is situated close to the spindle of the throttle-valve; and if 'from some cause the piston .flies out with very great velocity and theV weight H is far out on thel rod G, said rod is carried by the momentum of the weight far enough to close the throttle-valve almost entirely; but if the weight is close in toward the spindle ofthe throttle-valve, its momentum is not great enough to carry the rod G any farther than it would be carried by the direct action of the lever D against one of the tappets.

By these means thesupply of steam to the cylinder is regulated automatically, according to any increase ofthe stroke of the piston due to an increase of the speed of the engine.

What I claim as new, and desire to secure by Letters Patent, isi The mechanism, substantially such as herein set forth, whereby the steam-piston of a direct-acting engine is caused to partially or wholly close the throttle-valve whenever the stroke of said piston increases beyond the desired limit.

W. HAUFF, E. F. KAs'rENHUBER. 

